83 lines
3.1 KiB
XML
Vendored
83 lines
3.1 KiB
XML
Vendored
<refentry xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:src="http://nwalsh.com/xmlns/litprog/fragment"
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xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
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version="5.0" xml:id="olink.lang.fallback.sequence">
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<refmeta>
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<refentrytitle>olink.lang.fallback.sequence</refentrytitle>
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<refmiscinfo class="other" otherclass="datatype">string</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>olink.lang.fallback.sequence</refname>
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<refpurpose>look up translated documents if olink not found?</refpurpose>
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</refnamediv>
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<refsynopsisdiv> <src:fragment xml:id="olink.lang.fallback.sequence.frag">
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<xsl:param name="olink.lang.fallback.sequence"></xsl:param>
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</src:fragment>
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</refsynopsisdiv>
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<refsection><info><title>Description</title></info>
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<para>This parameter defines a list of lang values
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to search among to resolve olinks.
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</para>
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<para>Normally an olink tries to resolve to a document in the same
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language as the olink itself. The language of an olink
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is determined by its nearest ancestor element with a
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<tag class="attribute">lang</tag> attribute, otherwise the
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value of the <parameter>l10n.gentext.default.lang</parameter>
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parameter.
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</para>
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<para>An olink database can contain target data for the same
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document in multiple languages. Each set of data has the
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same value for the <tag>targetdoc</tag> attribute in
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the <tag>document</tag> element in the database, but with a
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different <tag>lang</tag> attribute value.
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</para>
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<para>When an olink is being resolved, the target is first
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sought in the document with the same language as the olink.
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If no match is found there, then this parameter is consulted
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for additional languages to try.</para>
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<para>The <parameter>olink.lang.fallback.sequence</parameter>
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must be a whitespace separated list of lang values to
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try. The first one with a match in the olink database is used.
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The default value is empty.</para>
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<para>For example, a document might be written in German
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and contain an olink with
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<literal>targetdoc="adminguide"</literal>.
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When the document is processed, the processor
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first looks for a target dataset in the
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olink database starting with:</para>
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<literallayout><literal><document targetdoc="adminguide" lang="de"></literal>.
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</literallayout>
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<para>If there is no such element, then the
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<parameter>olink.lang.fallback.sequence</parameter>
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parameter is consulted.
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If its value is, for example, <quote>fr en</quote>, then the processor next
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looks for <literal>targetdoc="adminguide" lang="fr"</literal>, and
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then for <literal>targetdoc="adminguide" lang="en"</literal>.
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If there is still no match, it looks for
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<literal>targetdoc="adminguide"</literal> with no
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lang attribute.
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</para>
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<para>This parameter is useful when a set of documents is only
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partially translated, or is in the process of being translated.
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If a target of an olink has not yet been translated, then this
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parameter permits the processor to look for the document in
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other languages. This assumes the reader would rather have
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a link to a document in a different language than to have
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a broken link.
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</para>
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</refsection>
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</refentry>
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